Most doctors and nurses measure blood pressure in one arm. A new British study published in The Lancet suggests that measuring it in both arms may be better. A difference in the arm-to-arm readings of 10 points or more can signal circulatory problems that may lead to stroke, peripheral artery disease, or other cardiovascular problems. In older people, an arm-to-arm difference in blood pressure is usually due to a blockage arising from atherosclerosis, the artery-clogging disease process that is at the root of most cardiovascular conditions. Next time you have your blood pressure checked, ask the doctor or nurse to do it on both arms. If there’s a difference greater than 10 point, another test called the ankle-brachial index might be in order to check for peripheral artery disease.
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